21世纪许多教练员都迷恋于多功能健身器械来训练运动员力量，但事实上并非所有运动项目都只能靠健身器训练，多功能健身器也不是适合于任何运动项目。如田径运动中的投掷类若用多功能健身器来发展爆发力是比较困难的，速度上受到了限制。然采用废弃汽车外胎（型号为6.50－12） Many trainers in the 21st century are infatuated with multi-functional fitness equipment to train athletes, but in fact not all sports can only be trained by fitness machines, which are not suitable for any sports. Such as throwing class in track and field if the use of multi-functional fitness apparatus to develop explosive power is more difficult, speed has been limited. However, the use of abandoned car tires (model 6.50-12)